After Trump's inauguration, government websites were changed to fit the incoming agenda. But some concerned scientists made sure they got as much government data as they could before that happened.
So-called "data rescuers" downloaded hundreds of thousands of pages about climate change and renewable energy in case the Trump administration removed or altered anything.
Trump has publicly doubted the legitimacy of climate change, and references to climate change have already been removed from the White House website.
The information will be stored on servers in Europe. Researchers now plan to check for any changes between the old data and anything the Trump administration publishes.